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Finding the Fourth Proportional to 25,957.74, 38,937.90 and 12,642.96

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Solution

The fourth proportional to 25,957.74, 38,937.90 and 12,642.96 is: 18,965.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,957.74 : 38,937.90 = 12,642.96 : x
  2. Step 2: Convert to fraction form
    25,957.74/38,937.90 = 12,642.96/x
  3. Step 3: Cross multiply
    25,957.74x = 38,937.90 × 12,642.96
  4. Step 4: Simplify right side
    25,957.74x = 492,290,312.18
  5. Step 5: Solve for x
    x = 492,290,312.18/25,957.74
  6. Step 6: Final answer
    x = 18,965.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.